Chrysanthemum plant named ‘Zanmustone’

ABSTRACT

A  chrysanthemum  plant named ‘Zanmustone’ characterized by its medium sized blooms with yellow ray florets and prolific branching; natural season flower date August 17 (week 34); blooming for a period of 5 weeks.

Botanical designation: Chrysanthemum×morifolium Ramat.

Cultivar denomination: ‘Zanmustone’.

BACKGROUND OF THE INVENTION

The present invention relates to a new and distinct cultivar of chrysanthemum plant, botanically known as Chrysanthemum×morifolium Ramat., commercially known as a garden mum, and hereinafter referred to by the cultivar denomination ‘Zanmustone’. ‘Zanmustone’ is a product of a breeding and selection program for outdoor pot mums (garden mums) which had the objective of creating new cultivars with a double type inflorescence, a natural season flowering date around August 17 (week 34), blooming for a period of 5 weeks. ‘Zanmustone’ is a seedling resulting from a cross of the female parent id 21570 with an unknown male parent. Plants of the new cultivar ‘Zanmustone’ differ from plants of the female parent in the natural season flowering date. The plants of the female parent flower at the end of September, while those of the seedling flower in mid-August.

The new and distinct cultivar was discovered and selected as a flowering plant by Wilhelmus Bernardus Blom on a cultivated field in Rijsenhout, The Netherlands in 2005. The first act of asexual production of ‘Zanmustone’ was accomplished when vegetative cuttings from the initial selection in 2005 were propagated further in a controlled environment in Rijsenhout, The Netherlands. The new cultivar has been found to retain its distinctive characteristics through successive propagations.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention of a new and distinct variety of chrysanthemum is shown in the accompanying drawings, the color being as nearly true as possible with color photographs of this type.

FIG. 1 shows a plant of the cultivar in full bloom.

FIG. 2 shows the various stages of bloom of the new cultivar.

FIG. 3 shows the various stages of foliage of the new cultivar.

DESCRIPTION OF THE INVENTION

The observations and measurements were gathered from plants grown out door in Rijsenhout, The Netherlands under natural day length and temperature and planted in week 23 in 2009. The natural blooming date of this crop was August 17 (week 34). The average height of the plants was 20 cm. No growth retardants were used. No tests were done on disease or insect resistance or susceptibility. No tests were done on cold or drought tolerance. This new variety produces medium sized blooms with yellow ray florets blooming for a period of 5 weeks.

From the cultivars known to inventor the most similar existing cultivar in comparison to ‘Zanmustone’ is ‘Zanmugolmine’ (U.S. Plant Patent applied). When ‘Zanmugolmine’ and ‘Zanmustone’ are being compared the following difference is noticed: The differences of ‘Zanmugolmine’ and ‘Zanmustone’ are (1) Color ray-floret. And (2) Plant size. (1) The ray-florets of ‘Zaumustone’ are more intensely yellow colored than those of ‘Zanmugolmine’. (2) The plants of ‘Zanmustone’ are slightly larger than those of ‘Zanmugolmine’.

The following is a description of the plant and characteristics that distinguish ‘Zanmustone’ as a new and distinct variety.

The color designations are taken from the plant itself. Accordingly, any discrepancies between the color designations and the colors depicted in the photographs are due to photographic tolerances. The color chart used in this description is: The Royal Horticultural Society Colour Chart, edition 2001.

TABLE 1 Botanical Description of Chrysanthemum xmorifolium Ramat. ‘Zanmustone’ Bud Size Small; cross-section 5 mm, height 3 mm Shape Round Texture Pubescent Outside Color Greyed-green 191A Phyllaries Number 25, arranged in 3 rows Shape Elliptic Apex Acute Base Truncate Margin Entire Color Upper surface: Greyed-green 191B Length and width 7 mm; 2 mm Texture Pubescent Inflorescence Type Double Height 2.5 cm Diameter 6 cm Peduncle length 6 cm Peduncle color Greyed-green 191A to B Peduncle diameter 1.8 mm Peduncle texture Pubescent Number per branch Approx 11 inflorescences Duration of flowering 5 weeks Seeds Produced in small quantities, ovate, Greyed-brown 199A, length 1.5 mm, diameter 0.5 mm Fragrance Faint chrysanthemum odor Color Center of inflorescence (disc Immature stage: Yellow 13B florets) Mature stage: Yellow 7A Color of upper surface of the Yellow 8A ray-florets Color of the lower surface Yellow 8B of the ray-florets Tonality from Distance A garden mum with yellow flowers Color of the ray-florets after Yellow 8A aging of the plant Ray florets Texture Upper and lower surface smooth Number Ca 190 Shape Elliptic Apex Rounded Base Attenuate Cross-section Concave Longitudinal axis of Straight majority Length of corolla tube 0.5-2 cm Ray-floret margin Entire Ray-floret length 2.5-3 cm Ray-floret width 5-6 mm Ratio length/width High Disc florets Disc diameter 2-3 mm Distribution of disc florets Few Shape Tubular Color Yellow-green 145C at base to Green Yellow 1D at top Length 3 mm Receptacle Color Yellow-green 145D Shape Domed raised Height 4 mm Diameter 6 mm Reproductive Organs Androecium Present on only disc florets Stamen length 3 mm Stamen color Yellow-green 144A Anther color Yellow 6D Pollen Present Pollen color Yellow 13A Gynoecium Present on both ray and disc florets Style color Yellow-green 154C Style Length 3 mm Stigma color Yellow 7A Stigma Width 1 mm Ovary Enclosed in calyx Plant Form Grown as a spray type pot mum, outdoor raised and mounded Growth habit Spherical shape Growth rate Medium Height 20 cm Width 30 cm Stem Color Greyed-brown 199A Stem Strength Medium Stem Brittleness Not brittle Stem Anthocyanin Coloration Not observed Internode length 2.5-3 cm Length of lateral branch From top to bottom 15 cm Lateral branch color Green 137 C Lateral branch, attachment Not brittle Lateral branch diameter 2 mm Branching (average number Prolific with 8 breaks after pinching of lateral branches) Natural season blooming date August 17 (week 34) Foliage Leaf color Upper side: Green 139 A to B Lower side: Greyed-green 191A Color midvein Upper side: Yellow-green 147D Lower side: Yellow-green 148D Size Small; length 2.5-4 cm, width 1.8-2.5 cm Quantity (number per lateral Ca. 16 branch) Shape Broadly elliptic Texture upper side Sparsely pubescent Texture under side Pubescent Venation arrangement Palmate Shape of the margin Serrated Shape of Base of Sinus Rounded Between Lateral Lobes Margin of Sinus Between Diverging Lateral Lobes Shape of Base Truncate to asymmetric Apex Mucronulate Petiole length 2-5 mm Petiole diameter 1.5-2 mm Petiole color Yellow-green 147D

TABLE 2 Differences with the comparison variety (when grown side to side) “Zanmustone” ‘Zanmugolmine’ Color upper surface ray-florets Yellow 7A Yellow 8A Plant height 20 cm 18 cm 

I claim:
 1. A new and distinct chrysanthemum plant named ‘Zanmustone’ as described and illustrated. 